First, Lao Wei threw down the walkie-talkie without saying a word and disappeared.

Next, Jin Pengfei took Xiao Liu to play flash.

Now the master and apprentice are simply gone, along with Xiao Liu, and they can't be contacted until now.

Under this strange seven-star altar, even the frequency of the walkie-talkie seems to have been affected in some way, completely turning into a "brick", and suspicious footprints appeared in front of them.

The four of them summed it up, and felt that since they had come here, there was no reason not to go in and take a look.

After all, everyone came in together, and they wanted to see people alive and corpses when they died.

"Then let's go, the third child and Lulu take care of Dr. Wu, and I will explore the way forward with Lao Wang."

With that, Lin Yi raised the fire fold and followed the footprints on the charcoal ash to the depths of the cave.

Along the way, several openings appeared around the cave.

It's about a meter deep, and it's lined with firewood.

There are about a dozen such firewood caves.

"Here, it won't be Yu Wenrui's processing workshop, right?"

"Possibly, otherwise why would he save so much firewood? There is so much charcoal ash in front, this wood must be used to burn charcoal. ”

Walking through the firewood caves in front of me, there were several hearths in front of me.

These hearths are simply constructed, with firewood on top and a pit on the bottom.

The firewood is stacked in the furnace body, and then the soil is mixed into mud in the soil pit, and the furnace wall is sealed with yellow mud, and the firewood can be burned into charcoal after smoldering.

Charcoal, whether it is used as a raw material for ironmaking by the "steel filling method", or as a fire to support combustion, is an indispensable and important material.

From this, it can be judged that this is indeed the distribution center of raw materials for Yuwenrui's manufacturing mechanisms, traps, and wood beasts.

To be honest, under the nose of Yang Shuang, the guard king of the Great Sui Dynasty, there is really no other way to make such a big battle, and not bury it deep underground.

Seeing this, Bai Lu's mind suddenly flashed with inspiration.

"Brother Lin, do you think this place will lead directly to the province?"

Before Lin Yi could express his position, Wang Qiang first held a negative opinion.

"No, our Wuwei in Ganlong is still far away from Inner Mongolia in the north."

"Not far away, we entered the Tengger Desert in Mingqin County, and then drove into the desert for about an hour.

According to the current administrative division, Beishan Township in Mingqin County is in front of the border between Ganlong and Inner Mongolia. ”

Wu Jingshan came earlier than them, and she has a better understanding of the geography here.

"I think what Lulu said makes sense, the border between Ganlong and the Eastern Turkic State was much closer back then than it is now. Let's think about it from another angle, if Yu Wenrui didn't open up this underground passage, where did the raw materials he hoarded come from? ”

"That's right, iron ore is needed for iron smelting, and wood is needed for charcoal burning, Yu Wenrui was able to engage in these moths under Yang Shuang's nose at that time, these raw materials were definitely not transported in from the territory of Dasui, that is, the Ganlong region, and it is likely that the Eastern Turkic State sent them in from the north."

"That means that there are two exits to this underground cave? One is the exit that Zhang Ji dug in order to hit Lu Shuihu by surprise, and the other is the secret passage made by Yu Wenrui and his two partners. ”

"That's how it should be."

Lin Yi squatted down and drew a simple structural section on the ground.

The above exit, in fact, is still in the territory of Wuwei, after going out, it may be just outflanked to the rear of the Lushuihu rebel camp, three thousand iron cavalry from the ground, hit them by surprise, so the exit of this hole must be very close to the ground, this passage is very unfavorable to Yu Wenrui to engage in these strange things, easy to expose.

In order to hide people's eyes, Yu Wenrui dug another passage under this passage, which led directly to the territory of the Eastern Turkic State. ”

"This passage may have been built by the Chuluo Khan of the Eastern Turkic State, which was a big project at the beginning."

After some inference, everyone thought that there was a high probability that there was an exit here, and their hearts were suddenly full of hope.

After all, in this black rumbling tunnel, after walking for so long, all kinds of bizarre events continue to occur throughout the whole process, which is a lot of torture for everyone's body and mind.

"Do you think it's because Lao Wei and they found this exit and left first?"

Qian Sheng muttered quietly.

"No way, Lao Wei is not such a person."

Wu Jingshan immediately retorted.

"That is to say, don't be foolish, Lao Jin, that person is also a rectum like me, not so crooked, even if they really find the exit, then they have to wait for us to go together, not to mention that they are not ordinary people, they are the people's police, right, Doctor Wu."

"Even if I put aside their professional status, with what I know about them, I would never do such a thing."

When Qian Sheng heard this, he quickly replied:

"Yes, I'll just say that, purely with the heart of a villain to spend the belly of a gentleman, no way, I'm like this as a businessman, eighty percent of the people I deal with are 'dirty hearts and rotten lungs', always think about people in the worst way, I will punish myself three cups first."

As he spoke, he reached out and gently twitched his cheek three times.

"Okay, everyone, pay more attention, the environment here is complicated, don't do anything else."

Lin Yi held the fire fold and cautiously walked through the hearth.

There seems to be a behemoth looming in front of you.

Lin Yi stretched out his hand and made a gesture to silence, and everyone immediately stopped talking, leaned over, and tiptoed towards this behemoth.

When the light of the fire fold could see it, he came closer to take a closer look.

It turned out that this behemoth was actually a huge double-layered Dan furnace.

Underneath are three curved supporting feet, very similar to the feet of the Dingqi.

The upper layer is a round and bulging hearth, with a diameter of about two meters away.

There is also a layer above the hearth, which looks like a huge gourd, and the neck is designed as a chimney.

This Dan furnace is made of cast iron as the main body, and a layer of shell is wrapped with red copper on the outside, and various auspicious cloud patterns are knocked out on the shell.

Tools were scattered around the hearth, and the ashes in the hearth had not yet had time to be removed.

"Why does this thing look so similar to the boiler in the Tushi Palace, where the Taishang Laojun refines Sun Monkey?"

"Listen to what you mean, have you seen Taishang Laojun's alchemy furnace? Presumably you saw it back then when you were Marshal Tianpeng in Heavenly Court, right? ”

Lin Yi joked. (End of chapter)